@@ -14,7 +14,7 namespace Implab.Test { | |||||
14 | p.Then(x => res = x); |
|
14 | p.Then(x => res = x); | |
15 | p.Resolve(100); |
|
15 | p.Resolve(100); | |
16 |
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16 | |||
17 |
Assert.AreEqual( |
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17 | Assert.AreEqual(100, res); | |
18 | } |
|
18 | } | |
19 |
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19 | |||
20 | [TestMethod] |
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20 | [TestMethod] | |
@@ -101,18 +101,18 namespace Implab.Test { | |||||
101 | public void WorkerPoolSizeTest() { |
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101 | public void WorkerPoolSizeTest() { | |
102 | var pool = new WorkerPool(5, 10, 0); |
|
102 | var pool = new WorkerPool(5, 10, 0); | |
103 |
|
103 | |||
104 |
Assert.AreEqual(5, pool. |
|
104 | Assert.AreEqual(5, pool.PoolSize); | |
105 |
|
105 | |||
106 | pool.Invoke(() => { Thread.Sleep(1000000); return 10; }); |
|
106 | pool.Invoke(() => { Thread.Sleep(100000000); return 10; }); | |
107 | pool.Invoke(() => { Thread.Sleep(1000000); return 10; }); |
|
107 | pool.Invoke(() => { Thread.Sleep(100000000); return 10; }); | |
108 | pool.Invoke(() => { Thread.Sleep(1000000); return 10; }); |
|
108 | pool.Invoke(() => { Thread.Sleep(100000000); return 10; }); | |
109 |
|
109 | |||
110 |
Assert.AreEqual(5, pool. |
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110 | Assert.AreEqual(5, pool.PoolSize); | |
111 |
|
111 | |||
112 | for (int i = 0; i < 100; i++) |
|
112 | for (int i = 0; i < 100; i++) | |
113 | pool.Invoke(() => { Thread.Sleep(1000000); return 10; }); |
|
113 | pool.Invoke(() => { Thread.Sleep(100000000); return 10; }); | |
114 |
Thread.Sleep( |
|
114 | Thread.Sleep(200); | |
115 |
Assert.AreEqual(10, pool. |
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115 | Assert.AreEqual(10, pool.PoolSize); | |
116 |
|
116 | |||
117 | pool.Dispose(); |
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117 | pool.Dispose(); | |
118 | } |
|
118 | } | |
@@ -149,10 +149,10 namespace Implab.Test { | |||||
149 | [TestMethod] |
|
149 | [TestMethod] | |
150 | public void WorkerPoolDisposeTest() { |
|
150 | public void WorkerPoolDisposeTest() { | |
151 | var pool = new WorkerPool(5, 20); |
|
151 | var pool = new WorkerPool(5, 20); | |
152 |
Assert.AreEqual(5, pool. |
|
152 | Assert.AreEqual(5, pool.PoolSize); | |
153 | pool.Dispose(); |
|
153 | pool.Dispose(); | |
154 |
Thread.Sleep( |
|
154 | Thread.Sleep(500); | |
155 |
Assert.AreEqual(0, pool. |
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155 | Assert.AreEqual(0, pool.PoolSize); | |
156 | pool.Dispose(); |
|
156 | pool.Dispose(); | |
157 | } |
|
157 | } | |
158 |
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158 | |||
@@ -244,7 +244,7 namespace Implab.Test { | |||||
244 | [TestMethod] |
|
244 | [TestMethod] | |
245 | public void ChainedMapTest() { |
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245 | public void ChainedMapTest() { | |
246 |
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246 | |||
247 |
using (var pool = new WorkerPool( |
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247 | using (var pool = new WorkerPool(4,4,0)) { | |
248 | int count = 10000; |
|
248 | int count = 10000; | |
249 |
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249 | |||
250 | double[] args = new double[count]; |
|
250 | double[] args = new double[count]; |
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@@ -15,19 +15,6 namespace Implab | |||||
15 | get; |
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15 | get; | |
16 | } |
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16 | } | |
17 |
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17 | |||
18 | /// <summary> |
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|||
19 | /// The current state of the promise. |
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|||
20 | /// </summary> |
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|||
21 | PromiseState State |
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22 | { |
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|||
23 | get; |
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|||
24 | } |
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|||
25 |
|
18 | |||
26 | /// <summary> |
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|||
27 | /// Registers handler for the case when the promise is cencelled. If the promise already cancelled the |
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28 | /// handler will be invoked immediatelly. |
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|||
29 | /// </summary> |
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|||
30 | /// <param name="handler">The handler</param> |
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|||
31 | void HandleCancelled(Action handler); |
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|||
32 | } |
|
19 | } | |
33 | } |
|
20 | } |
@@ -140,7 +140,7 namespace Implab.Parallels { | |||||
140 |
|
140 | |||
141 | AsyncPool.InvokeNewThread(() => { |
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141 | AsyncPool.InvokeNewThread(() => { | |
142 | for (int i = 0; i < source.Length; i++) { |
|
142 | for (int i = 0; i < source.Length; i++) { | |
143 |
if(promise. |
|
143 | if(promise.IsResolved) | |
144 | break; // stop processing in case of error or cancellation |
|
144 | break; // stop processing in case of error or cancellation | |
145 | var idx = i; |
|
145 | var idx = i; | |
146 | semaphore.WaitOne(); |
|
146 | semaphore.WaitOne(); |
@@ -9,10 +9,15 namespace Implab.Parallels { | |||||
9 | public abstract class DispatchPool<TUnit> : IDisposable { |
|
9 | public abstract class DispatchPool<TUnit> : IDisposable { | |
10 | readonly int m_minThreads; |
|
10 | readonly int m_minThreads; | |
11 | readonly int m_maxThreads; |
|
11 | readonly int m_maxThreads; | |
12 | int m_runningThreads = 0; |
|
12 | ||
13 | int m_maxRunningThreads = 0; |
|
13 | int m_createdThreads = 0; // the current size of the pool | |
14 | int m_suspended = 0; |
|
14 | int m_activeThreads = 0; // the count of threads which are active | |
15 | int m_exitRequired = 0; |
|
15 | int m_sleepingThreads = 0; // the count of currently inactive threads | |
|
16 | int m_maxRunningThreads = 0; // the meximum reached size of the pool | |||
|
17 | int m_exitRequired = 0; // the pool is going to shutdown, all unused workers are released | |||
|
18 | int m_releaseTimeout = 100; // the timeout while the working thread will wait for the new tasks before exit | |||
|
19 | int m_wakeEvents = 0; // the count of wake events | |||
|
20 | ||||
16 | AutoResetEvent m_hasTasks = new AutoResetEvent(false); |
|
21 | AutoResetEvent m_hasTasks = new AutoResetEvent(false); | |
17 |
|
22 | |||
18 | protected DispatchPool(int min, int max) { |
|
23 | protected DispatchPool(int min, int max) { | |
@@ -44,9 +49,15 namespace Implab.Parallels { | |||||
44 | StartWorker(); |
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49 | StartWorker(); | |
45 | } |
|
50 | } | |
46 |
|
51 | |||
47 |
public int |
|
52 | public int PoolSize { | |
48 | get { |
|
53 | get { | |
49 |
return m_ |
|
54 | return m_createdThreads; | |
|
55 | } | |||
|
56 | } | |||
|
57 | ||||
|
58 | public int ActiveThreads { | |||
|
59 | get { | |||
|
60 | return m_activeThreads; | |||
50 | } |
|
61 | } | |
51 | } |
|
62 | } | |
52 |
|
63 | |||
@@ -64,29 +75,120 namespace Implab.Parallels { | |||||
64 |
|
75 | |||
65 | protected abstract bool TryDequeue(out TUnit unit); |
|
76 | protected abstract bool TryDequeue(out TUnit unit); | |
66 |
|
77 | |||
67 | protected virtual bool ExtendPool() { |
|
78 | #region thread execution traits | |
68 | if (m_suspended > 0) { |
|
79 | int SignalThread() { | |
|
80 | var signals = Interlocked.Increment(ref m_wakeEvents); | |||
|
81 | if(signals == 1) | |||
|
82 | m_hasTasks.Set(); | |||
|
83 | return signals; | |||
|
84 | } | |||
|
85 | ||||
|
86 | bool FetchSignalOrWait(int timeout) { | |||
|
87 | var start = Environment.TickCount; | |||
|
88 | ||||
|
89 | // означает, что поток владеет блокировкой и при успешном получении сигнала должен | |||
|
90 | // ее вернуть, чтобы другой ожидающий поток смог | |||
|
91 | bool hasLock = false; | |||
|
92 | do { | |||
|
93 | int signals; | |||
|
94 | do { | |||
|
95 | signals = m_wakeEvents; | |||
|
96 | if (signals == 0) | |||
|
97 | break; | |||
|
98 | } while (Interlocked.CompareExchange(ref m_wakeEvents, signals - 1, signals) != signals); | |||
|
99 | ||||
|
100 | if (signals >= 1) { | |||
|
101 | if (signals > 1 && hasLock) | |||
69 | m_hasTasks.Set(); |
|
102 | m_hasTasks.Set(); | |
70 | return true; |
|
103 | return true; | |
71 |
} |
|
104 | } | |
72 |
|
|
105 | ||
|
106 | if (timeout != -1) | |||
|
107 | timeout = Math.Max(0, timeout - (Environment.TickCount - start)); | |||
|
108 | ||||
|
109 | // если сигналов больше не осталось, то первый поток, который дошел сюда сбросит событие | |||
|
110 | // и уйдет на пустой цикл, после чего заблокируется | |||
|
111 | ||||
|
112 | hasLock = true; | |||
|
113 | } while (m_hasTasks.WaitOne(timeout)); | |||
|
114 | ||||
|
115 | return false; | |||
73 | } |
|
116 | } | |
74 |
|
117 | |||
|
118 | bool Sleep(int timeout) { | |||
|
119 | Interlocked.Increment(ref m_sleepingThreads); | |||
|
120 | if (FetchSignalOrWait(timeout)) { | |||
|
121 | Interlocked.Decrement(ref m_sleepingThreads); | |||
|
122 | return true; | |||
|
123 | } else { | |||
|
124 | Interlocked.Decrement(ref m_sleepingThreads); | |||
|
125 | return false; | |||
|
126 | } | |||
|
127 | } | |||
|
128 | #endregion | |||
|
129 | ||||
75 | /// <summary> |
|
130 | /// <summary> | |
76 | /// Запускает либо новый поток, если раньше не было ни одного потока, либо устанавливает событие пробуждение одного спящего потока |
|
131 | /// Запускает либо новый поток, если раньше не было ни одного потока, либо устанавливает событие пробуждение одного спящего потока | |
77 | /// </summary> |
|
132 | /// </summary> | |
78 |
protected void |
|
133 | protected void GrowPool() { | |
79 | m_hasTasks.Set(); // wake sleeping thread; |
|
134 | if (m_exitRequired != 0) | |
|
135 | return; | |||
|
136 | if (m_sleepingThreads > m_wakeEvents) { | |||
|
137 | //Console.WriteLine("Waking threads (sleeps {0}, pending {1})", m_sleepingThreads, m_wakeEvents); | |||
|
138 | ||||
|
139 | // all sleeping threads may gone | |||
|
140 | SignalThread(); // wake a sleeping thread; | |||
|
141 | ||||
|
142 | // we can't check whether signal has been processed | |||
|
143 | // anyway it may take some time for the thread to start | |||
|
144 | // we will ensure that at least one thread is running | |||
80 |
|
145 | |||
81 | if (AllocateThreadSlot(1)) { |
|
146 | if (AllocateThreadSlot(1)) { | |
|
147 | // if there were no threads in the pool | |||
82 | var worker = new Thread(this.Worker); |
|
148 | var worker = new Thread(this.Worker); | |
83 | worker.IsBackground = true; |
|
149 | worker.IsBackground = true; | |
84 | worker.Start(); |
|
150 | worker.Start(); | |
85 | } |
|
151 | } | |
|
152 | } else { | |||
|
153 | // if there is no sleeping threads in the pool | |||
|
154 | StartWorker(); | |||
|
155 | } | |||
86 | } |
|
156 | } | |
87 |
|
157 | |||
88 |
pr |
|
158 | private bool Suspend() { | |
89 | m_hasTasks.WaitOne(); |
|
159 | //no tasks left, exit if the thread is no longer needed | |
|
160 | bool last; | |||
|
161 | bool requestExit; | |||
|
162 | ||||
|
163 | // if threads have a timeout before releasing | |||
|
164 | if (m_releaseTimeout > 0) | |||
|
165 | requestExit = !Sleep(m_releaseTimeout); | |||
|
166 | else | |||
|
167 | requestExit = true; | |||
|
168 | ||||
|
169 | if (!requestExit) | |||
|
170 | return true; | |||
|
171 | ||||
|
172 | // release unsused thread | |||
|
173 | if (requestExit && ReleaseThreadSlot(out last)) { | |||
|
174 | // in case at the moment the last thread was being released | |||
|
175 | // a new task was added to the queue, we need to try | |||
|
176 | // to revoke the thread to avoid the situation when the task is left unprocessed | |||
|
177 | if (last && Sleep(0)) { // Sleep(0) will fetch pending task or will return false | |||
|
178 | if (AllocateThreadSlot(1)) | |||
|
179 | return true; // spin again... | |||
|
180 | else | |||
|
181 | SignalThread(); // since Sleep(0) has fetched the signal we neet to reschedule it | |||
|
182 | ||||
|
183 | } | |||
|
184 | ||||
|
185 | return false; | |||
|
186 | } | |||
|
187 | ||||
|
188 | // wait till infinity | |||
|
189 | Sleep(-1); | |||
|
190 | ||||
|
191 | return true; | |||
90 | } |
|
192 | } | |
91 |
|
193 | |||
92 | #region thread slots traits |
|
194 | #region thread slots traits | |
@@ -95,11 +197,11 namespace Implab.Parallels { | |||||
95 | int current; |
|
197 | int current; | |
96 | // use spins to allocate slot for the new thread |
|
198 | // use spins to allocate slot for the new thread | |
97 | do { |
|
199 | do { | |
98 |
current = m_ |
|
200 | current = m_createdThreads; | |
99 | if (current >= m_maxThreads || m_exitRequired != 0) |
|
201 | if (current >= m_maxThreads || m_exitRequired != 0) | |
100 | // no more slots left or the pool has been disposed |
|
202 | // no more slots left or the pool has been disposed | |
101 | return false; |
|
203 | return false; | |
102 |
} while (current != Interlocked.CompareExchange(ref m_ |
|
204 | } while (current != Interlocked.CompareExchange(ref m_createdThreads, current + 1, current)); | |
103 |
|
205 | |||
104 | UpdateMaxThreads(current + 1); |
|
206 | UpdateMaxThreads(current + 1); | |
105 |
|
207 | |||
@@ -107,7 +209,7 namespace Implab.Parallels { | |||||
107 | } |
|
209 | } | |
108 |
|
210 | |||
109 | bool AllocateThreadSlot(int desired) { |
|
211 | bool AllocateThreadSlot(int desired) { | |
110 |
if (desired - 1 != Interlocked.CompareExchange(ref m_ |
|
212 | if (desired - 1 != Interlocked.CompareExchange(ref m_createdThreads, desired, desired - 1)) | |
111 | return false; |
|
213 | return false; | |
112 |
|
214 | |||
113 | UpdateMaxThreads(desired); |
|
215 | UpdateMaxThreads(desired); | |
@@ -120,11 +222,11 namespace Implab.Parallels { | |||||
120 | int current; |
|
222 | int current; | |
121 | // use spins to release slot for the new thread |
|
223 | // use spins to release slot for the new thread | |
122 | do { |
|
224 | do { | |
123 |
current = m_ |
|
225 | current = m_createdThreads; | |
124 | if (current <= m_minThreads && m_exitRequired == 0) |
|
226 | if (current <= m_minThreads && m_exitRequired == 0) | |
125 | // the thread is reserved |
|
227 | // the thread is reserved | |
126 | return false; |
|
228 | return false; | |
127 |
} while (current != Interlocked.CompareExchange(ref m_ |
|
229 | } while (current != Interlocked.CompareExchange(ref m_createdThreads, current - 1, current)); | |
128 |
|
230 | |||
129 | last = (current == 1); |
|
231 | last = (current == 1); | |
130 |
|
232 | |||
@@ -136,7 +238,7 namespace Implab.Parallels { | |||||
136 | /// </summary> |
|
238 | /// </summary> | |
137 | /// <returns>true - no more threads left</returns> |
|
239 | /// <returns>true - no more threads left</returns> | |
138 | bool ReleaseThreadSlotAnyway() { |
|
240 | bool ReleaseThreadSlotAnyway() { | |
139 |
var left = Interlocked.Decrement(ref m_ |
|
241 | var left = Interlocked.Decrement(ref m_createdThreads); | |
140 | return left == 0; |
|
242 | return left == 0; | |
141 | } |
|
243 | } | |
142 |
|
244 | |||
@@ -164,54 +266,41 namespace Implab.Parallels { | |||||
164 | } |
|
266 | } | |
165 | } |
|
267 | } | |
166 |
|
268 | |||
167 | bool FetchTask(out TUnit unit) { |
|
269 | protected abstract void InvokeUnit(TUnit unit); | |
|
270 | ||||
|
271 | void Worker() { | |||
|
272 | TUnit unit; | |||
|
273 | //Console.WriteLine("{0}: Active", Thread.CurrentThread.ManagedThreadId); | |||
|
274 | Interlocked.Increment(ref m_activeThreads); | |||
168 | do { |
|
275 | do { | |
169 | // exit if requested |
|
276 | // exit if requested | |
170 | if (m_exitRequired != 0) { |
|
277 | if (m_exitRequired != 0) { | |
171 | // release the thread slot |
|
278 | // release the thread slot | |
|
279 | Interlocked.Decrement(ref m_activeThreads); | |||
172 | if (ReleaseThreadSlotAnyway()) // it was the last worker |
|
280 | if (ReleaseThreadSlotAnyway()) // it was the last worker | |
173 | m_hasTasks.Dispose(); |
|
281 | m_hasTasks.Dispose(); | |
174 | else |
|
282 | else | |
175 |
|
|
283 | SignalThread(); // wake next worker | |
176 | unit = default(TUnit); |
|
284 | unit = default(TUnit); | |
177 |
|
|
285 | break; | |
178 | } |
|
286 | } | |
179 |
|
287 | |||
180 | // fetch task |
|
288 | // fetch task | |
181 | if (TryDequeue(out unit)) { |
|
289 | if (TryDequeue(out unit)) { | |
182 |
|
|
290 | InvokeUnit(unit); | |
183 |
|
|
291 | continue; | |
184 | } |
|
|||
185 |
|
||||
186 | //no tasks left, exit if the thread is no longer needed |
|
|||
187 | bool last; |
|
|||
188 | if (ReleaseThreadSlot(out last)) { |
|
|||
189 | if (last && m_hasTasks.WaitOne(0)) { |
|
|||
190 | if (AllocateThreadSlot(1)) |
|
|||
191 | continue; // spin again... |
|
|||
192 | else |
|
|||
193 | // we failed to reallocate slot for this thread |
|
|||
194 | // therefore we need to release the event |
|
|||
195 | m_hasTasks.Set(); |
|
|||
196 |
|
|
292 | } | |
197 |
|
293 | |||
198 | return false; |
|
294 | Interlocked.Decrement(ref m_activeThreads); | |
199 | } |
|
|||
200 |
|
295 | |||
201 | // entering suspend state |
|
296 | // entering suspend state | |
202 | Interlocked.Increment(ref m_suspended); |
|
|||
203 | // keep this thread and wait |
|
297 | // keep this thread and wait | |
204 |
Suspend() |
|
298 | if (!Suspend()) | |
205 | Interlocked.Decrement(ref m_suspended); |
|
299 | break; | |
|
300 | //Console.WriteLine("{0}: Awake", Thread.CurrentThread.ManagedThreadId); | |||
|
301 | Interlocked.Increment(ref m_activeThreads); | |||
206 | } while (true); |
|
302 | } while (true); | |
207 | } |
|
303 | //Console.WriteLine("{0}: Exited", Thread.CurrentThread.ManagedThreadId); | |
208 |
|
||||
209 | protected abstract void InvokeUnit(TUnit unit); |
|
|||
210 |
|
||||
211 | void Worker() { |
|
|||
212 | TUnit unit; |
|
|||
213 | while (FetchTask(out unit)) |
|
|||
214 | InvokeUnit(unit); |
|
|||
215 | } |
|
304 | } | |
216 |
|
305 | |||
217 | protected virtual void Dispose(bool disposing) { |
|
306 | protected virtual void Dispose(bool disposing) { | |
@@ -221,7 +310,10 namespace Implab.Parallels { | |||||
221 | return; |
|
310 | return; | |
222 |
|
311 | |||
223 | // wake sleeping threads |
|
312 | // wake sleeping threads | |
224 |
|
|
313 | if (m_createdThreads > 0) | |
|
314 | SignalThread(); | |||
|
315 | else | |||
|
316 | m_hasTasks.Dispose(); | |||
225 | GC.SuppressFinalize(this); |
|
317 | GC.SuppressFinalize(this); | |
226 | } |
|
318 | } | |
227 | } |
|
319 | } |
@@ -42,12 +42,13 namespace Implab.Parallels { | |||||
42 | next = first.next; |
|
42 | next = first.next; | |
43 | if (next == null) { |
|
43 | if (next == null) { | |
44 | // this is the last element, |
|
44 | // this is the last element, | |
45 | // then try to update tail |
|
45 | // then try to update the tail | |
46 | if (first != Interlocked.CompareExchange(ref m_last, null, first)) { |
|
46 | if (first != Interlocked.CompareExchange(ref m_last, null, first)) { | |
47 |
// this is |
|
47 | // this is a ace condition | |
48 | if (m_last == null) |
|
48 | if (m_last == null) | |
|
49 | // the queue is empty | |||
49 | return false; |
|
50 | return false; | |
50 |
// tail has been changed, tha |
|
51 | // tail has been changed, than we need to restart | |
51 | continue; |
|
52 | continue; | |
52 | } |
|
53 | } | |
53 |
|
54 |
@@ -57,16 +57,8 namespace Implab.Parallels { | |||||
57 | var len = Interlocked.Increment(ref m_queueLength); |
|
57 | var len = Interlocked.Increment(ref m_queueLength); | |
58 | m_queue.Enqueue(unit); |
|
58 | m_queue.Enqueue(unit); | |
59 |
|
59 | |||
60 | if(!ExtendPool()) |
|
60 | if (len > m_threshold*ActiveThreads) | |
61 |
|
|
61 | GrowPool(); | |
62 | } |
|
|||
63 |
|
||||
64 | protected override bool ExtendPool() { |
|
|||
65 | if (m_queueLength <= m_threshold*ThreadCount) |
|
|||
66 | // in this case we are in active thread and it request for additional workers |
|
|||
67 | // satisfy it only when queue is longer than threshold |
|
|||
68 | return false; |
|
|||
69 | return base.ExtendPool(); |
|
|||
70 | } |
|
62 | } | |
71 |
|
63 | |||
72 | protected override bool TryDequeue(out Action unit) { |
|
64 | protected override bool TryDequeue(out Action unit) { | |
@@ -81,9 +73,5 namespace Implab.Parallels { | |||||
81 | unit(); |
|
73 | unit(); | |
82 | } |
|
74 | } | |
83 |
|
75 | |||
84 | protected override void Suspend() { |
|
|||
85 | if (m_queueLength == 0) |
|
|||
86 | base.Suspend(); |
|
|||
87 |
|
|
76 | } | |
88 | } |
|
77 | } | |
89 | } |
|
@@ -3,6 +3,7 using System.Collections.Generic; | |||||
3 | using System.Reflection; |
|
3 | using System.Reflection; | |
4 | using System.Diagnostics; |
|
4 | using System.Diagnostics; | |
5 | using System.Threading; |
|
5 | using System.Threading; | |
|
6 | using Implab.Parallels; | |||
6 |
|
7 | |||
7 | namespace Implab { |
|
8 | namespace Implab { | |
8 |
|
9 | |||
@@ -48,24 +49,53 namespace Implab { | |||||
48 | /// </remarks> |
|
49 | /// </remarks> | |
49 | public class Promise<T> : IPromise { |
|
50 | public class Promise<T> : IPromise { | |
50 |
|
51 | |||
51 |
struct |
|
52 | struct HandlerDescriptor { | |
52 | public ResultHandler<T> resultHandler; |
|
53 | public ResultHandler<T> resultHandler; | |
53 | public ErrorHandler errorHandler; |
|
54 | public ErrorHandler errorHandler; | |
|
55 | public Action cancellHandler; | |||
|
56 | ||||
|
57 | public void Resolve(T result) { | |||
|
58 | if (resultHandler != null) | |||
|
59 | try { | |||
|
60 | resultHandler(result); | |||
|
61 | } catch (Exception e) { | |||
|
62 | Reject(e); | |||
54 | } |
|
63 | } | |
|
64 | } | |||
|
65 | ||||
|
66 | public void Reject(Exception err) { | |||
|
67 | if (errorHandler != null) | |||
|
68 | try { | |||
|
69 | errorHandler(err); | |||
|
70 | } catch { | |||
|
71 | } | |||
|
72 | } | |||
|
73 | ||||
|
74 | public void Cancel() { | |||
|
75 | if (cancellHandler != null) | |||
|
76 | try { | |||
|
77 | cancellHandler(); | |||
|
78 | } catch { | |||
|
79 | } | |||
|
80 | } | |||
|
81 | } | |||
|
82 | ||||
|
83 | const int UnresolvedSate = 0; | |||
|
84 | const int TransitionalState = 1; | |||
|
85 | const int ResolvedState = 2; | |||
|
86 | const int RejectedState = 3; | |||
|
87 | const int CancelledState = 4; | |||
55 |
|
88 | |||
56 | readonly IPromise m_parent; |
|
89 | readonly IPromise m_parent; | |
57 |
|
90 | readonly bool m_cancellable; | ||
58 | LinkedList<ResultHandlerInfo> m_resultHandlers = new LinkedList<ResultHandlerInfo>(); |
|
|||
59 | LinkedList<Action> m_cancelHandlers = new LinkedList<Action>(); |
|
|||
60 |
|
91 | |||
61 | readonly object m_lock = new Object(); |
|
|||
62 | readonly bool m_cancellable; |
|
|||
63 | int m_childrenCount = 0; |
|
92 | int m_childrenCount = 0; | |
64 |
|
93 | int m_state; | ||
65 | PromiseState m_state; |
|
|||
66 | T m_result; |
|
94 | T m_result; | |
67 | Exception m_error; |
|
95 | Exception m_error; | |
68 |
|
96 | |||
|
97 | readonly MTQueue<HandlerDescriptor> m_handlers = new MTQueue<HandlerDescriptor>(); | |||
|
98 | ||||
69 | public Promise() { |
|
99 | public Promise() { | |
70 | m_cancellable = true; |
|
100 | m_cancellable = true; | |
71 | } |
|
101 | } | |
@@ -73,8 +103,6 namespace Implab { | |||||
73 | public Promise(IPromise parent, bool cancellable) { |
|
103 | public Promise(IPromise parent, bool cancellable) { | |
74 | m_cancellable = cancellable; |
|
104 | m_cancellable = cancellable; | |
75 | m_parent = parent; |
|
105 | m_parent = parent; | |
76 | if (parent != null) |
|
|||
77 | parent.HandleCancelled(InternalCancel); |
|
|||
78 | } |
|
106 | } | |
79 |
|
107 | |||
80 | void InternalCancel() { |
|
108 | void InternalCancel() { | |
@@ -82,22 +110,39 namespace Implab { | |||||
82 | Cancel(false); |
|
110 | Cancel(false); | |
83 | } |
|
111 | } | |
84 |
|
112 | |||
|
113 | bool BeginTransit() { | |||
|
114 | return UnresolvedSate == Interlocked.CompareExchange(ref m_state, TransitionalState, UnresolvedSate); | |||
|
115 | } | |||
|
116 | ||||
|
117 | void CompleteTransit(int state) { | |||
|
118 | if (TransitionalState != Interlocked.CompareExchange(ref m_state, state, TransitionalState)) | |||
|
119 | throw new InvalidOperationException("Can't complete transition when the object isn't in the transitional state"); | |||
|
120 | } | |||
|
121 | ||||
|
122 | public bool IsResolved { | |||
|
123 | get { | |||
|
124 | return m_state > 1; | |||
|
125 | } | |||
|
126 | } | |||
|
127 | ||||
|
128 | public bool IsCancelled { | |||
|
129 | get { | |||
|
130 | return m_state == CancelledState; | |||
|
131 | } | |||
|
132 | } | |||
|
133 | ||||
85 | /// <summary> |
|
134 | /// <summary> | |
86 | /// Выполняет обещание, сообщая об успешном выполнении. |
|
135 | /// Выполняет обещание, сообщая об успешном выполнении. | |
87 | /// </summary> |
|
136 | /// </summary> | |
88 | /// <param name="result">Результат выполнения.</param> |
|
137 | /// <param name="result">Результат выполнения.</param> | |
89 | /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception> |
|
138 | /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception> | |
90 | public void Resolve(T result) { |
|
139 | public void Resolve(T result) { | |
91 | lock (m_lock) { |
|
140 | if (BeginTransit()) { | |
92 | if (m_state == PromiseState.Cancelled) |
|
141 | m_result = result; | |
93 | return; |
|
142 | CompleteTransit(ResolvedState); | |
94 | if (m_state != PromiseState.Unresolved) |
|
143 | OnStateChanged(); | |
|
144 | } else if (m_state != CancelledState) | |||
95 |
|
|
145 | throw new InvalidOperationException("The promise is already resolved"); | |
96 | m_result = result; |
|
|||
97 | m_state = PromiseState.Resolved; |
|
|||
98 | } |
|
|||
99 |
|
||||
100 | OnStateChanged(); |
|
|||
101 | } |
|
146 | } | |
102 |
|
147 | |||
103 | /// <summary> |
|
148 | /// <summary> | |
@@ -111,16 +156,12 namespace Implab { | |||||
111 | /// <param name="error">Исключение возникшее при выполнении операции</param> |
|
156 | /// <param name="error">Исключение возникшее при выполнении операции</param> | |
112 | /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception> |
|
157 | /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception> | |
113 | public void Reject(Exception error) { |
|
158 | public void Reject(Exception error) { | |
114 | lock (m_lock) { |
|
159 | if (BeginTransit()) { | |
115 | if (m_state == PromiseState.Cancelled || m_state == PromiseState.Rejected) |
|
160 | m_error = error; | |
116 | return; |
|
161 | CompleteTransit(RejectedState); | |
117 | if (m_state != PromiseState.Unresolved) |
|
162 | OnStateChanged(); | |
|
163 | } else if (m_state == ResolvedState) | |||
118 |
|
|
164 | throw new InvalidOperationException("The promise is already resolved"); | |
119 | m_error = error; |
|
|||
120 | m_state = PromiseState.Rejected; |
|
|||
121 | } |
|
|||
122 |
|
||||
123 | OnStateChanged(); |
|
|||
124 | } |
|
165 | } | |
125 |
|
166 | |||
126 | /// <summary> |
|
167 | /// <summary> | |
@@ -144,27 +185,27 namespace Implab { | |||||
144 |
|
185 | |||
145 | var medium = new Promise<T>(this, true); |
|
186 | var medium = new Promise<T>(this, true); | |
146 |
|
187 | |||
147 | var handlerInfo = new ResultHandlerInfo(); |
|
188 | ResultHandler<T> resultHandler; | |
148 |
|
||||
149 | if (success != null) |
|
189 | if (success != null) | |
150 |
|
|
190 | resultHandler = x => { | |
151 | success(x); |
|
191 | success(x); | |
152 | medium.Resolve(x); |
|
192 | medium.Resolve(x); | |
153 | }; |
|
193 | }; | |
154 | else |
|
194 | else | |
155 |
|
|
195 | resultHandler = medium.Resolve; | |
156 |
|
196 | |||
|
197 | ErrorHandler errorHandler; | |||
157 | if (error != null) |
|
198 | if (error != null) | |
158 |
|
|
199 | errorHandler = x => { | |
159 | try { |
|
200 | try { | |
160 | error(x); |
|
201 | error(x); | |
161 | } catch { } |
|
202 | } catch { } | |
162 | medium.Reject(x); |
|
203 | medium.Reject(x); | |
163 | }; |
|
204 | }; | |
164 | else |
|
205 | else | |
165 |
|
|
206 | errorHandler = medium.Reject; | |
166 |
|
207 | |||
167 | AddHandler(handlerInfo); |
|
208 | AddHandler(resultHandler, errorHandler, medium.InternalCancel); | |
168 |
|
209 | |||
169 | return medium; |
|
210 | return medium; | |
170 | } |
|
211 | } | |
@@ -182,27 +223,28 namespace Implab { | |||||
182 |
|
223 | |||
183 | var medium = new Promise<T>(this, true); |
|
224 | var medium = new Promise<T>(this, true); | |
184 |
|
225 | |||
185 | var handlerInfo = new ResultHandlerInfo(); |
|
226 | ResultHandler<T> resultHandler; | |
|
227 | ErrorHandler errorHandler; | |||
186 |
|
228 | |||
187 | if (success != null) |
|
229 | if (success != null) | |
188 |
|
|
230 | resultHandler = x => { | |
189 | success(x); |
|
231 | success(x); | |
190 | medium.Resolve(x); |
|
232 | medium.Resolve(x); | |
191 | }; |
|
233 | }; | |
192 | else |
|
234 | else | |
193 |
|
|
235 | resultHandler = medium.Resolve; | |
194 |
|
236 | |||
195 | if (error != null) |
|
237 | if (error != null) | |
196 |
|
|
238 | errorHandler = x => { | |
197 | try { |
|
239 | try { | |
198 | medium.Resolve(error(x)); |
|
240 | medium.Resolve(error(x)); | |
199 | } catch { } |
|
241 | } catch { } | |
200 | medium.Reject(x); |
|
242 | medium.Reject(x); | |
201 | }; |
|
243 | }; | |
202 | else |
|
244 | else | |
203 |
|
|
245 | errorHandler = medium.Reject; | |
204 |
|
246 | |||
205 | AddHandler(handlerInfo); |
|
247 | AddHandler(resultHandler, errorHandler, medium.InternalCancel); | |
206 |
|
248 | |||
207 | return medium; |
|
249 | return medium; | |
208 | } |
|
250 | } | |
@@ -214,19 +256,17 namespace Implab { | |||||
214 |
|
256 | |||
215 | var medium = new Promise<T>(this, true); |
|
257 | var medium = new Promise<T>(this, true); | |
216 |
|
258 | |||
217 | var handlerInfo = new ResultHandlerInfo(); |
|
259 | ResultHandler<T> resultHandler; | |
218 |
|
260 | |||
219 | if (success != null) |
|
261 | if (success != null) | |
220 |
|
|
262 | resultHandler = x => { | |
221 | success(x); |
|
263 | success(x); | |
222 | medium.Resolve(x); |
|
264 | medium.Resolve(x); | |
223 | }; |
|
265 | }; | |
224 | else |
|
266 | else | |
225 |
|
|
267 | resultHandler = medium.Resolve; | |
226 |
|
268 | |||
227 | handlerInfo.errorHandler = medium.Reject; |
|
269 | AddHandler(resultHandler, medium.Reject, medium.InternalCancel); | |
228 |
|
||||
229 | AddHandler(handlerInfo); |
|
|||
230 |
|
270 | |||
231 | return medium; |
|
271 | return medium; | |
232 | } |
|
272 | } | |
@@ -249,15 +289,17 namespace Implab { | |||||
249 |
|
289 | |||
250 | var medium = new Promise<T>(this, true); |
|
290 | var medium = new Promise<T>(this, true); | |
251 |
|
291 | |||
252 |
AddHandler( |
|
292 | AddHandler( | |
253 |
|
|
293 | null, | |
|
294 | e => { | |||
254 | try { |
|
295 | try { | |
255 | medium.Resolve(handler(e)); |
|
296 | medium.Resolve(handler(e)); | |
256 | } catch (Exception e2) { |
|
297 | } catch (Exception e2) { | |
257 | medium.Reject(e2); |
|
298 | medium.Reject(e2); | |
258 | } |
|
299 | } | |
259 | } |
|
300 | }, | |
260 | }); |
|
301 | medium.InternalCancel | |
|
302 | ); | |||
261 |
|
303 | |||
262 | return medium; |
|
304 | return medium; | |
263 | } |
|
305 | } | |
@@ -268,8 +310,8 namespace Implab { | |||||
268 |
|
310 | |||
269 | var medium = new Promise<T>(); |
|
311 | var medium = new Promise<T>(); | |
270 |
|
312 | |||
271 |
AddHandler( |
|
313 | AddHandler( | |
272 |
|
|
314 | x => { | |
273 | // to avoid handler being called multiple times we handle exception by ourselfs |
|
315 | // to avoid handler being called multiple times we handle exception by ourselfs | |
274 | try { |
|
316 | try { | |
275 | handler(); |
|
317 | handler(); | |
@@ -278,13 +320,16 namespace Implab { | |||||
278 | medium.Reject(e); |
|
320 | medium.Reject(e); | |
279 | } |
|
321 | } | |
280 | }, |
|
322 | }, | |
281 | errorHandler = x => { |
|
323 | ||
|
324 | e => { | |||
282 | try { |
|
325 | try { | |
283 | handler(); |
|
326 | handler(); | |
284 | } catch { } |
|
327 | } catch { } | |
285 |
medium.Reject( |
|
328 | medium.Reject(e); | |
286 | } |
|
329 | }, | |
287 | }); |
|
330 | ||
|
331 | medium.InternalCancel | |||
|
332 | ); | |||
288 |
|
333 | |||
289 | return medium; |
|
334 | return medium; | |
290 | } |
|
335 | } | |
@@ -304,17 +349,22 namespace Implab { | |||||
304 | // создаем прицепленное обещание |
|
349 | // создаем прицепленное обещание | |
305 | var chained = new Promise<TNew>(); |
|
350 | var chained = new Promise<TNew>(); | |
306 |
|
351 | |||
307 | AddHandler(new ResultHandlerInfo() { |
|
352 | ResultHandler<T> resultHandler = result => chained.Resolve(mapper(result)); | |
308 | resultHandler = result => chained.Resolve(mapper(result)), |
|
353 | ErrorHandler errorHandler = delegate(Exception e) { | |
309 | errorHandler = delegate(Exception e) { |
|
|||
310 |
|
|
354 | if (error != null) | |
311 |
|
|
355 | try { | |
312 |
|
|
356 | error(e); | |
313 |
|
|
357 | } catch { } | |
314 |
|
|
358 | // в случае ошибки нужно передать исключение дальше по цепочке | |
315 |
|
|
359 | chained.Reject(e); | |
316 |
|
|
360 | }; | |
317 | }); |
|
361 | ||
|
362 | ||||
|
363 | AddHandler( | |||
|
364 | resultHandler, | |||
|
365 | errorHandler, | |||
|
366 | chained.InternalCancel | |||
|
367 | ); | |||
318 |
|
368 | |||
319 | return chained; |
|
369 | return chained; | |
320 | } |
|
370 | } | |
@@ -341,9 +391,8 namespace Implab { | |||||
341 | // передать через него результаты работы. |
|
391 | // передать через него результаты работы. | |
342 | var medium = new Promise<TNew>(this, true); |
|
392 | var medium = new Promise<TNew>(this, true); | |
343 |
|
393 | |||
344 | AddHandler(new ResultHandlerInfo { |
|
394 | ResultHandler<T> resultHandler = delegate(T result) { | |
345 | resultHandler = delegate(T result) { |
|
395 | if (medium.IsCancelled) | |
346 | if (medium.State == PromiseState.Cancelled) |
|
|||
347 |
|
|
396 | return; | |
348 |
|
397 | |||
349 |
|
|
398 | var promise = chained(result); | |
@@ -354,14 +403,20 namespace Implab { | |||||
354 |
|
|
403 | x => medium.Resolve(x), | |
355 |
|
|
404 | e => medium.Reject(e) | |
356 |
|
|
405 | ); | |
357 |
|
|
406 | }; | |
358 | errorHandler = delegate(Exception e) { |
|
407 | ||
|
408 | ErrorHandler errorHandler = delegate(Exception e) { | |||
359 |
|
|
409 | if (error != null) | |
360 |
|
|
410 | error(e); | |
361 |
|
|
411 | // в случае ошибки нужно передать исключение дальше по цепочке | |
362 |
|
|
412 | medium.Reject(e); | |
363 |
|
|
413 | }; | |
364 | }); |
|
414 | ||
|
415 | AddHandler( | |||
|
416 | resultHandler, | |||
|
417 | errorHandler, | |||
|
418 | medium.InternalCancel | |||
|
419 | ); | |||
365 |
|
420 | |||
366 | return medium; |
|
421 | return medium; | |
367 | } |
|
422 | } | |
@@ -371,19 +426,19 namespace Implab { | |||||
371 | } |
|
426 | } | |
372 |
|
427 | |||
373 | public Promise<T> Cancelled(Action handler) { |
|
428 | public Promise<T> Cancelled(Action handler) { | |
374 | if (handler == null) |
|
429 | AddHandler(null, null, handler); | |
375 | return this; |
|
|||
376 | lock (m_lock) { |
|
|||
377 | if (m_state == PromiseState.Unresolved) |
|
|||
378 | m_cancelHandlers.AddLast(handler); |
|
|||
379 | else if (m_state == PromiseState.Cancelled) |
|
|||
380 | handler(); |
|
|||
381 | } |
|
|||
382 | return this; |
|
430 | return this; | |
383 | } |
|
431 | } | |
384 |
|
432 | |||
385 |
public |
|
433 | public Promise<T> Finally(Action handler) { | |
386 |
|
|
434 | if (handler == null) | |
|
435 | throw new ArgumentNullException("handler"); | |||
|
436 | AddHandler( | |||
|
437 | x => handler(), | |||
|
438 | e => handler(), | |||
|
439 | handler | |||
|
440 | ); | |||
|
441 | return this; | |||
387 | } |
|
442 | } | |
388 |
|
443 | |||
389 | /// <summary> |
|
444 | /// <summary> | |
@@ -415,15 +470,15 namespace Implab { | |||||
415 | if (!evt.WaitOne(timeout, true)) |
|
470 | if (!evt.WaitOne(timeout, true)) | |
416 | throw new TimeoutException(); |
|
471 | throw new TimeoutException(); | |
417 |
|
472 | |||
418 |
switch ( |
|
473 | switch (m_state) { | |
419 |
case |
|
474 | case ResolvedState: | |
420 | return m_result; |
|
475 | return m_result; | |
421 |
case |
|
476 | case CancelledState: | |
422 | throw new OperationCanceledException(); |
|
477 | throw new OperationCanceledException(); | |
423 |
case |
|
478 | case RejectedState: | |
424 | throw new TargetInvocationException(m_error); |
|
479 | throw new TargetInvocationException(m_error); | |
425 | default: |
|
480 | default: | |
426 |
throw new ApplicationException(String.Format("Invalid promise state {0}", |
|
481 | throw new ApplicationException(String.Format("Invalid promise state {0}", m_state)); | |
427 | } |
|
482 | } | |
428 | } |
|
483 | } | |
429 |
|
484 | |||
@@ -431,40 +486,45 namespace Implab { | |||||
431 | return Join(Timeout.Infinite); |
|
486 | return Join(Timeout.Infinite); | |
432 | } |
|
487 | } | |
433 |
|
488 | |||
434 |
void AddHandler(ResultHandler |
|
489 | void AddHandler(ResultHandler<T> success, ErrorHandler error, Action cancel) { | |
435 | bool invokeRequired = false; |
|
490 | Interlocked.Increment(ref m_childrenCount); | |
|
491 | ||||
|
492 | HandlerDescriptor handler = new HandlerDescriptor { | |||
|
493 | resultHandler = success, | |||
|
494 | errorHandler = error, | |||
|
495 | cancellHandler = cancel | |||
|
496 | }; | |||
436 |
|
497 | |||
437 | lock (m_lock) { |
|
498 | bool queued; | |
438 | m_childrenCount++; |
|
|||
439 | if (m_state == PromiseState.Unresolved) { |
|
|||
440 | m_resultHandlers.AddLast(handler); |
|
|||
441 | } else |
|
|||
442 | invokeRequired = true; |
|
|||
443 | } |
|
|||
444 |
|
499 | |||
445 | // обработчики не должны блокировать сам объект |
|
500 | if (!IsResolved) { | |
446 | if (invokeRequired) |
|
501 | m_handlers.Enqueue(handler); | |
|
502 | queued = true; | |||
|
503 | } else { | |||
|
504 | // the promise is in resolved state, just invoke the handled with minimum overhead | |||
|
505 | queued = false; | |||
447 | InvokeHandler(handler); |
|
506 | InvokeHandler(handler); | |
448 | } |
|
507 | } | |
449 |
|
508 | |||
450 | void InvokeHandler(ResultHandlerInfo handler) { |
|
509 | if (queued && IsResolved && m_handlers.TryDequeue(out handler)) | |
|
510 | // if the promise have been resolved while we was adding handler to the queue | |||
|
511 | // we can't guarantee that someone is still processing it | |||
|
512 | // therefore we will fetch a handler from the queue and execute it | |||
|
513 | // note that fetched handler may be not the one we have added | |||
|
514 | InvokeHandler(handler); | |||
|
515 | ||||
|
516 | } | |||
|
517 | ||||
|
518 | void InvokeHandler(HandlerDescriptor handler) { | |||
451 | switch (m_state) { |
|
519 | switch (m_state) { | |
452 |
case |
|
520 | case ResolvedState: | |
453 | try { |
|
521 | handler.Resolve(m_result); | |
454 | if (handler.resultHandler != null) |
|
|||
455 | handler.resultHandler(m_result); |
|
|||
456 | } catch (Exception e) { |
|
|||
457 | try { |
|
|||
458 | if (handler.errorHandler != null) |
|
|||
459 | handler.errorHandler(e); |
|
|||
460 | } catch { } |
|
|||
461 | } |
|
|||
462 | break; |
|
522 | break; | |
463 |
case |
|
523 | case RejectedState: | |
464 |
|
|
524 | handler.Reject(m_error); | |
465 | if (handler.errorHandler != null) |
|
525 | break; | |
466 | handler.errorHandler(m_error); |
|
526 | case CancelledState: | |
467 |
|
|
527 | handler.Cancel(); | |
468 | break; |
|
528 | break; | |
469 | default: |
|
529 | default: | |
470 | // do nothing |
|
530 | // do nothing | |
@@ -473,76 +533,31 namespace Implab { | |||||
473 | } |
|
533 | } | |
474 |
|
534 | |||
475 | protected virtual void OnStateChanged() { |
|
535 | protected virtual void OnStateChanged() { | |
476 | switch (m_state) { |
|
536 | HandlerDescriptor handler; | |
477 | case PromiseState.Resolved: |
|
537 | while (m_handlers.TryDequeue(out handler)) | |
478 | foreach (var resultHandlerInfo in m_resultHandlers) |
|
538 | InvokeHandler(handler); | |
479 | try { |
|
|||
480 | if (resultHandlerInfo.resultHandler != null) |
|
|||
481 | resultHandlerInfo.resultHandler(m_result); |
|
|||
482 | } catch (Exception e) { |
|
|||
483 | try { |
|
|||
484 | if (resultHandlerInfo.errorHandler != null) |
|
|||
485 | resultHandlerInfo.errorHandler(e); |
|
|||
486 | } catch { } |
|
|||
487 | } |
|
|||
488 | break; |
|
|||
489 | case PromiseState.Cancelled: |
|
|||
490 | foreach (var cancelHandler in m_cancelHandlers) |
|
|||
491 | cancelHandler(); |
|
|||
492 | break; |
|
|||
493 | case PromiseState.Rejected: |
|
|||
494 | foreach (var resultHandlerInfo in m_resultHandlers) |
|
|||
495 | try { |
|
|||
496 | if (resultHandlerInfo.errorHandler != null) |
|
|||
497 | resultHandlerInfo.errorHandler(m_error); |
|
|||
498 | } catch { } |
|
|||
499 | break; |
|
|||
500 | default: |
|
|||
501 | throw new InvalidOperationException(String.Format("Promise entered an invalid state {0}", m_state)); |
|
|||
502 | } |
|
|||
503 |
|
||||
504 | m_resultHandlers = null; |
|
|||
505 | m_cancelHandlers = null; |
|
|||
506 | } |
|
539 | } | |
507 |
|
540 | |||
508 |
|
541 | |||
509 |
|
542 | |||
510 | public bool IsExclusive { |
|
543 | public bool IsExclusive { | |
511 | get { |
|
544 | get { | |
512 | lock (m_lock) { |
|
|||
513 |
|
|
545 | return m_childrenCount <= 1; | |
514 |
|
|
546 | } | |
515 |
|
|
547 | } | |
516 | } |
|
|||
517 |
|
||||
518 | public PromiseState State { |
|
|||
519 | get { |
|
|||
520 | lock (m_lock) { |
|
|||
521 | return m_state; |
|
|||
522 | } |
|
|||
523 | } |
|
|||
524 | } |
|
|||
525 |
|
548 | |||
526 | protected bool Cancel(bool dependencies) { |
|
549 | protected bool Cancel(bool dependencies) { | |
527 | bool result; |
|
550 | if (BeginTransit()) { | |
528 |
|
551 | CompleteTransit(CancelledState); | ||
529 | lock (m_lock) { |
|
|||
530 | if (m_state == PromiseState.Unresolved) { |
|
|||
531 | m_state = PromiseState.Cancelled; |
|
|||
532 | result = true; |
|
|||
533 | } else { |
|
|||
534 | result = false; |
|
|||
535 | } |
|
|||
536 | } |
|
|||
537 |
|
||||
538 | if (result) |
|
|||
539 | OnStateChanged(); |
|
552 | OnStateChanged(); | |
540 |
|
553 | |||
541 |
if (dependencies && m_parent != null && m_parent.IsExclusive) |
|
554 | if (dependencies && m_parent != null && m_parent.IsExclusive) | |
542 | m_parent.Cancel(); |
|
555 | m_parent.Cancel(); | |
|
556 | ||||
|
557 | return true; | |||
|
558 | } else { | |||
|
559 | return false; | |||
543 | } |
|
560 | } | |
544 |
|
||||
545 | return result; |
|
|||
546 | } |
|
561 | } | |
547 |
|
562 | |||
548 | } |
|
563 | } |
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